Fuel-burning grate



June 23, 1925 .Filed lNw! 2.5, *193.1

l I a Corg I BYQM IN VEN TOR. www

A TTORNEYS.

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fuel consumption. jj s y 2,. i' .,A; further object-of.k the, inventionris to l i; "r n The improved grateconiprises a plurality Patented June 23, 1925.

, UNIT-ED PA T;ENT orrics;

comin. REID, or 'NiAGARiifrALLs NEW YORK.

-FUELFBURNINGfGnATn-- -f-,iippiieaiioir alea irpveinbr 25, 192i..4v .serial No. 517,432'.

This invention relates -to fuelf'jburningk grates. l r

An obgect of the present: invention isto provide a grate of increasedleliiciency in provide Va Vgrate* ,of universal character,

sizes and grades.; y A further obJect is Vto provide a grate especially adaptedto be easily and,econoini--v cally repaired and maintained.

An improved embodiment ofthe invenlk tion illustrating-the manner infwhich these and other` objects are attainable fis herein described and. illustrated in the accompanying drawings, inwhich Figiljsfa p lan view of a portioni of a'.

grate, from which certain elements ,have been in part removedfto, illustrate the underl-l lying construction. i,

Fig. 2 fisa vertical section transverse fofv Vthe grate.

Figure r3 one element.

of parallel units `independently trunnined in a supporting frame, eachiunit correspond,-

Y ing to a grate bar ,ofthe ordinarygwell kno-wn vgrateconstruction. i

i LEach unit comprises a4 rectangularpast# ing l Aoflength equal to one dimension ofV the'fireibox and considerably less in width, so that a plurality of'units assembled side by side will form a grate. The casting is providedA with a plurality. of openings 2 which'may be rectangular in outline and should extend froinedge to edge of the unit and be placed as near together aspracticable, allowing only for suflicient web between and surrounding the openings to impart sufficient strength tothe grate. Surrounding each opening Qis an upstanding flange 3, preferably tapering upward, with a vertical inner face and an outer faceuniforinly inclined upwardly and inwardly, as shown readily adapted foruse withicoal of various Y vis an enlarged View of la modi- Vfiedforin of one element., Y l .Y p Y -..Figu`re. l is an'.y enlarged section.throughjv ""lwplace.

5 extends transversely acrossv s:

each opening, each web having a centraly boltlhole 6. gAdra'ft-directing and regulat-V ing cap, 7 vis provided for each` opening 2. Each cap comprises a casting corresponding iiioutline tothe shape of the opening and having a rounded top L8 terminating ina ydepending flange oiyskirt 9 having aLuniforinly inclined 'inner face Vof angular slope corresponding to the inclination on the face 4 of flange 3fand ,of a circumference to surround the flange. A supporting bolt l0 has its head cast in the,` under. side ,off the cap, the bolt fbeing adapted to bei supported inthe bolt hole l6 of the web'to support the passage between lthe skirt9 and flange face 4f. Theweb 5 lis preferably depressed ybelow {thesurface of the casting 1- to rprovide space fortlie upper adjusting nut V-ll withoutun-k Vduly increasing the height; fthe'tflange and the/llgth ofthe skirt. i f

Al trunnion l2 pro]ecting the .mid-Y dl'eof each endA of* the fnnit 'providesy for supporting the'untsin' place in imrallel relationinthe furnace.. ,The linner wall off the furnaceor. thezflire box ofthe furnace may have an inwardly extending fflangel, on Vwhich' 'the trunnion' 12 rotatablyirestsv v cap. -in place, by ineansov-fl adjusting ynuts 11 ,abo-ve and below the web. The capv may be 'so supported as to leave any desired air A vretaining -strip. `lll clamped tov theflange Y.

trunnion will yseryetfo lhold. the :units in Depend Ffigure 3` illustrates a@-rnodificaution k13 `.by Ll-'shapedv bolts llembracing each cranky T16' fon; eachuinit iii provide for .shakingv our-dumping the grate in he usual, v.man-ner, details yof' whichmecha` which jcapsva-farecircularin outline. ,Otherf :iig

lustra'ted inaxliguresfl and, 2.; ,The circular capinayp-resent certainY advantages in that there is vrless lifoility of yashes lodging against the cap in shaking or dumping the grate. ,'However, co'nsiderationofV space will in great measure determine the shape of the caps,vv it being desirable to provide for y the necessary volume of air through the space.

between lflange face 4l and skirt 9,V without unduly reducing the strength of the unit.

It is to be noted that the units are arthat no direct air passage'through the grate kwisentlie constrnctionis'the` saine as that il` A-ranged lwith kadjacent edges .in contact so i" is' provided. Air supplied by forceddraft or otherwise will pass through the grate only'by: the path indicated by the arrows in Fig. 4. Therefore, there are no direetopen ings as in the old types of' grate in-'common use. Such direct openings cause areas of rapid combustion immediately at the` openings but cause areas of inferior combustion therebetween. The improved construction: providesfor the greatest possible diffusion oii'air thrcnrghoutthe` enti-rel fire bed. As theair` passes through under ski-rt 9 it will bei evenly diffused, some tending tofollow along-the surface of casting l andiy other portions tending to follow the-surface of the caps. The result is thatan4 extremely uniform distribution of ari-r throughout is oblta-ined' and the efiiciency of the grate is thereby increased. TheV volume of ai-r may heY readily predetermined by Athe adjustment of' the nuts 1l, whereby the air pas sage is vuniformly increased or decreased.

`l/Viththis improved gratey it has beenv* fou1rd"that lower grades of fuel', such las screenings, ete., may Vbe used withv an efii'- ciency in heating ton'for ton equal to the efliei'ency ordinarily obtained from the larger sizes lof coa*l 1' Tear-.and burnmg'ma-y be compensated forhy proper adjustment ofthe caps; Also,

a: burned" out :ori broken cap may be readilyl replaced -without scrapping the entire` 'unit'. What If Aclaim as new' and desire to secure i i by Letters Patent of. the United States is- Vthe openings.

i LA' fuel burning grate:- comprising a supportingmember having openings7 a liange surrounding each opening, a caphaving adependingA skirt 'surrounding each fi'angeand providing an v uninterrupted' passage? for air through the openings and'between the flanges and skirts around; the-entire periphery of 2; A fuel burning grate comprising afsuporti-nd memberv'havi-nfff' o enin s a flange 2D b 7 D surrounding each opening, a cap having av depending skirt surrounding each flangeJ and providing av passage for air through v'the openingsand uninterrupted around the en#` tire periphery of the openings between the flanges and skirts, and means for adjusting the'caps to'control thevolumeof' air per'A mit-ted to pass through said openings.

3. A fuel burning grate comprising asupporting member having openings',VV a tapered {ia-ngel surrounding each opening anda cap having adepending skirt conforming to the taper of said fiange and surrounding each fiange and providing a passage for air through the openings between the flanges and skirts uninterrupted around the entire periphery of the openings.

4. A fuel burning grate comprising a plurality of independently rotatable units, each unit comprising a supporting member having openings,V a flange surroimdingV eachl opening, a cap having a dep'endin skirt surrounding each flange and provi ing a passage/for air through the openings and between the flanges and skirts.

5. A fuel burning grate comprisinga plurality of independently rotatable units, each unitcomprising a supporting member having openingsa flange surrounding, each.

'through the openings and lbetweenthe fianges and skirts, and means for adjusting theV caps ,to control the volume eta-ir per# n'iifttedY topass through saitrl'L opening 7. A grate bar comprisinga casting having av plurality of openingsg each opening surrounded by an upstanding tapered iia-nge and traversed by a cap-supporting web', and au rounded cap co-operatingwith eachfopenf ing-5 each caphaving-a depending skirtcorresponding in outline to the upstandi-ng Y flangev and surrounding the same, each cap having' adjustable supporting means for supporting theV cap onV the transverse Web ofthecorresponding opening.- v

In witness whereof; l have hereuntoy sub-` scribed my name. f

y conn REID/.- 

